EVEREST RANSOMWARE CLAIMS MAILCHIMP AS NEW VICTIM IN RELATIVELY SMALL BREACH

Summary from the TLDR InfoSec newsletter

Everest ransomware group claims to have breached Mailchimp, stealing 767 MB of data containing 943,536 lines, including business information, domain names, company emails, and technology stack details. The leaked data appears to be structured business information from marketing or CRM exports rather than Mailchimp's internal systems, suggesting the breach may have targeted customer data rather than core infrastructure. Everest follows the double extortion model and previously breached Coca-Cola in May, though it remains a relatively obscure ransomware strain compared to major groups.